respond_to

<br /><br />#===============================================<br />class ApplicationController < ActionController::Base<br /> before_filter :adjust_format_for_iphone<br /> helper_method :iphone_user_agent?<br /><br />protected<br /> def adjust_format_for_iphone<br /> request.format = :iphone if iphone_user_agent? || iphone_subdomain?<br /> end<br /><br /> # Request from an iPhone or iPod touch?<br /> # (Mobile Safari user agent)<br /> def iphone_user_agent?<br /> request.env["HTTP_USER_AGENT" ] &&<br /> request.env["HTTP_USER_AGENT" ][/(Mobile\/.+Safari)/]<br /> end<br /><br /> def iphone_subdomain?<br /> return request.subdomains.first == "iphone"<br /> end<br />end<br /><br /><br /><br /># =======================<br /># custom format<br /># config/initializers/mime_types.rb<br />Mime::Type.register ‘audio/mpeg’, :mp3?Mime::Type.register ‘audio/mpegurl’, :m3u<br /><br /><br />def show<br /> @mp3 = Mp3.find(params[:id])<br /> respond_to do |format|<br /> format.html<br /> format.mp3 { redirect_to @mp3.url }<br /> format.m3u { render :text => @mp3.url }<br /> end<br />end<br /><br /><br /><br />#========================<br />def index<br /> @users = User.find(:all)<br /> respond_to do |format|<br /> format.js {<br /> render :update do |page|<br /> page.replace_html ‘content’, ‘<p>blah</p>’<br /> end<br /> }<br /> format.html #index.html.erb<br /> end<br />end<br /><br />